Jurnal Ilmiah PLATAX

Analysis Of Particle Content In Kappaphyccus alvarezii Seaweed In The Waters Of Arakan Village Using Scan Electron Microscopy–Energy Dispersive X-ray Spectroscopy (SEM-EDX)

Sandra Tilaar, Stenly Wullur, Esther Angkouw — Wed, 29 Nov 2023 00:00:00 +0800

Kappaphycus alvarezii seaweed is widely cultivated in Indonesia and has important economic value. Nevertheless, this seaweed is easily attacked by diseases. This study was to determine the ice-ice triggers in seaweed farming locations. This research study was conducted at Arakan Village, South Minahasa, North Sulawesi. We performed the bacteria isolation on the infected thallus of Kappaphycus alvarezii and found Staphylococcus arlettae caused the infection. Staphylococcus aureus used to be found on the skin and mucous membranes of healthy humans, while Staphylococcus epidermis inhabits only the skin of healthy humans. Approximately 30% of the normal healthy population was affected by Staphylococcus aureus as it asymptomatically colonizes human hosts. How this Staphylococcus arlettae (mainly found in pork farms) infected Kappaphycus alvarezii which is in a high salinity environment requires an in-depth study. We completed the experiment by using Scan Electron Microscopy–Energy Dispersive X-ray Spectroscopy (SEM-EDX), analysis on infected thallus Kappaphycus alvarezii, and a series of bacteria isolation to observe the morphology and the element contents of Staphylococcus arlettae bacteria has successfully attached to the surface of Kappaphycus alvarezii and caused an infection. This proves that environmental changes have stimulated pathogenic bacteria Staphylococcus arlettae in the area where Kappaphycus alvarezii is cultivated. The mechanism of biosorption by microbes that can live in environments that are contaminated with Pb metal is active uptake. This mechanism occurs simultaneously in line with the consumption of metal ions for the growth of microorganisms. Staphylococcus arlettae are resistant to heavy metals due to the ability to detoxify the influence of heavy metals in the presence of protein or granular material. From the results of the study using SEM-EDX of algae and bacteria Staphylococcus arlettae, it can be concluded that the content of the particle of metal in thallus triggers bacteria to live on the seaweed as an energy source.

Keywords: Bacteria, disease, infection, Kappaphycus alvarezii, seaweed, Staphylococcus arlettae

Nutritional Value Composition Of Lamun Fruit Enhalus Acoroides From Samboang Beach, Bulukumba District, Sulawesi Selatan

Sukal Minsas, Warsidah, Irwan — Wed, 29 Nov 2023 00:00:00 +0800

As the main producer, seagrass leaves are the main food for several marine animals such as turtles and dugongs, while seagrass fruit which contains soft seeds can be consumed as food for humans, but it is not very popular and there is not much information regarding the nutritional content of seagrass fruit. One species of seagrass that is often found in the waters of Samboang Beach, Bulukumba Regency is the Enhalus acoroides species. This research aims to determine the proximate and essential metal content of Enhalus acoroides seagrass fruit taken from Samboang coastal waters, Bulukumba Regency, South Sulawesi. Determination of proximates, namely proteins, was carried out using the Kjeldahl method, fats using the extraction method with n-hexane solvent and essential metals, and while determination of essential metal content using the atomic absorption spectrophotometry method. The results of this research show that the water content is 87%, the ash content is 0.76%, the protein content is 1.2%, the fat content is 0.66% and the carbohydrate content is 10.38%. The essential metal test results show zinc (Zn) levels of 5.32 ppm, iron (Fe) of 7.2 ppm, and cobalt (Co) of 0.11 ppm.

Keywords: Enhalus acoroides, proximate, protein, Samboang beach, essential

Abstrak

Sebagai produsen utama, daun lamun merupakan makanan utama dari beberapa hewan laut seperti penyu dan dugong sedangkan buah lamun yang mengandung biji yang lunak dapat dikonsumsi sebagai pangan untuk manusia, tetapi belum begitu populer dan informasi terkait kandungan gizi dari buah lamun tersebut belum banyak ditemukan. Salah satu spesies lamun yang banyak ditemukan di perairan Pantai Samboang Kabupaten Bulukumba adalah dari jenis Enhalus acoroides. Penelitian ini bertujuan untuk menentukan kandungan proksimat dan logam esensial dari buah lamun Enhalus acoroides yang diambil dari perairan pantai Samboang Kabupaten Bulukumba Sulawesi Selatan. Penentuan proksimat yaitu protein dilakukan dengan metode kjeldahl, lemak menggunakan metode ekstraksi dengan pelarut n-heksan dan logam esensial, sedangkan penentuan kandungan logam esensial dengan menggunakan metode spektrofotometri serapan atom. Dari hasil penelitian ini menunjukkan kadar air sebesar 87%, kadar abu sebesar 0.76%, kadar protein sebesar 1.2 %, kadar lemak sebesar 0.66% dan kadar karbohidrat sebesar 10.38 %. Pada hasil pengujian logam esensial menunjukkan kadar logam zink (Zn) sebesar 5.32 ppm, besi (Fe) sebesar 7.2 ppm dan kobalt (Co) sebesar 0.11 ppm

Keywords: Enhalus acoroides, proksimat, protein, Samboang beach, essensial

Diversity Of Types And Abundance Of Algae, In Meras Waters Of North Sulawesi, Photosynthesis Pigments And Cell Structure

Deislie Roxmerie H Kumampung, Frans Lumoindong, Ester Dellayani Angkouw — Wed, 29 Nov 2023 00:00:00 +0800

Research on the diversity of algae types and their abundance in Meras waters has been carried out using structured line transect sampling and quadrant placement methods. The result is a diversity of algae types with a Shannon index (H') above 1.75. This shows that the diversity of algae types is moderate where water conditions are still good enough for algae growth. This is reinforced by the results of analysis of the structure of algal cells using TEM which found the presence of Floridian starch as evidence of the photosynthesis process taking place in these waters. When algae to grow and develop will carry out the process of photosynthesis. There were 9 species of algae found spread across 3 classes, namely 3 species of Chlorophyceae, 4 species of Phaeophyceae, and 3 species of Rhodophyceae. The results of the analysis of species abundance in these waters show that the algae species Gracilaria edulis is the most abundant, namely 7.6 individuals/m2, while the relative abundance is 0.28. The results of the analysis of photosynthetic pigments in the algae Gracilaria edulis were chlorophyll a, namely 359.335 µg, chlorophyll d 47.385 µg, and 1627.75 µg of carotene pigment. This algae pigment can be used as a raw material in the food (nutrification) and pharmaceutical industries.

Keywords: Diversity of algae types, pigments, and cell structure

Abstrak

Penelitian Keanekaragaman jenis alga dan kelimpahannya di perairan Meras telah dilakukan dengan metode pengambilan sampel line transek dan peletakan kuadran secara terstruktur. Hasilnya adalah keanekaragaman jenis alga dengan index Shannon (H’) berada di atas 1,75 Hal ini menunjukkan bahwa keanekaragaman jenis alga sedang dimana kondisi perairan masih cukup baik untuk pertumbuhan alga. Hal ini diperkuat dengan hasil analisis struktur sel alga menggunakan TEM ditemukan adanya floridean starch bukti adanya berlangsung proses fotosintesis di perairan tersebut. Dimana alga untuk tumbuh dan berkembang akan melakukan proses fotosintesis. Spesies alga yang ditemukan sebanyak 9 spesies yang tersebar dalam 3 kelas yaitu Chlorophyceae 3 spesies, Phaeophyceae 4 spesies dan 3 spesies Rhodophyceae. Hasil analisis kelimpahan spesies di perairan tersebut menunjukkan bahwa spesies alga Gracilaria edulis paling melimpah yaitu 7,6 individu/m²sedangkan kelimpahan relatifnya adalah 0,28. Hasil analisis pigmen fotosintesis pada alga Gracilaria edulis adalah klorofil a yaitu 359,335 µg, klorofil d 47,385 µg dan 1627,75 µg pigmen karoten. Pigmen alga ini dapat dimanfaatkan sebagai bahan baku dalam industri makanan (nutrifikasi) dan farmasetika.

Kata kunci : Keanekaragaman jenis alga, pigmen, dan struktur sel.

Zooplankton in the Seagrass Beds of Nain Island

Wed, 29 Nov 2023 00:00:00 +0800

This research was conducted in July 2022, the determination of sampling locations was carried out by purposive sampling, namely data collection with certain considerations to obtain samples that represent the research location area. Seawater samples were taken using a plankton net which was then used for the zooplankton identification process carried out in the Marine Biology Laboratory of the Faculty of Fisheries and Marine Science. Measurement of physical parameters of water chemistry consisting of temperature, salinity, and pH, was carried out in situ. The content of nitrate and phosphate was conducted at the WLN laboratory (Water Laboratory Nusantara-WLN). Zooplankton counts were expressed in ind/l. Qualitative determination of plankton was made up to the genus level. The results of zooplankton identification consisted of 5 genera namely Acartia, Cyclops, Euterpina, Nauplius, and Oithona. The calculation of zooplankton abundance is in the range of 3-5 ind/l. The highest abundance was found at station one which was 5 ind/l followed by station three which was 4 ind/l and then station two as much as 3 ind/l. The diversity index is in the range of 0.4740-0.7786, the uniformity index is in the range of 0.2945-0.7087, and the dominance index ranges from 0.5971-0.7744.

Keywords: Zooplankton, Seagrass Meadow, Nain Island, Abundance, Biological Index.

Abstrak

Penelitian ini dilaksanakan pada bulan Juli 2022, penentuan lokasi pengambilan sampel dilakukan dengan cara purposive sampling yaitu pengumpulan data dengan pertimbangan tertentu untuk memperoleh sampel yang mewakili wilayah lokasi penelitian. Sampel air laut diambil dengan menggunakan plankton net yang selanjutnya digunakan untuk proses identifikasi zooplankton yang dilakukan di Laboratorium Biologi Kelautan Fakultas Perikanan dan Ilmu Kelautan. Pengukuran parameter fisik kimia air yang terdiri dari suhu, salinitas, pH, dilakukan secara in situ. Kadar nitrat dan fosfat dilakukan di laboratorium WLN (Laboratorium Air Nusantara-WLN). Jumlah Zooplankton dinyatakan dalam ind/l. Penentuan plankton secara kualitatif dilakukan sampai tingkat genus. Hasil identifikasi zooplankton terdiri dari 5 genus yaitu Acartia, Cyclops, Euterpina, Nauplius, dan Oithona. Perhitungan kelimpahan zooplankton berada pada kisaran 3-5 ind/l. Kelimpahan tertinggi terdapat pada stasiun satu sebesar 5 ind/l, disusul stasiun tiga sebesar 4 ind/l dan kemudian stasiun dua sebanyak 3 ind/l. Indeks keanekaragaman berada pada rentang 0,4740-0,7786, indeks keseragaman berada pada rentang 0,2945-0,7087, sedangkan indeks dominasi berkisar antara 0,5971-0,7744.

Kata Kunci: Zooplankton, Padang Lamun, Pulau Nain, Kelimpahan, Indeks Biologi.

Utilization of Landsat 8/ETM+ and Google Earth Engine Images for Coastal Identification in Sungai Nibung Village, Kubu Raya Regency, West Kalimantan

Syarif Irwan Nurdiansyah , Shifa Helena, Warsidah — Sat, 02 Dec 2023 00:00:00 +0800

Changes in coastlines cause continuous processes through various processes, both abrasion and coastal accretion, which are caused by sediment movements and coastal currents. This research aims to map changes in the coastline in Sungai Nibung Village using multi-temporal imagery for 2013-2023 from Google Earth Engine (GEE). The benefit of this research is to see changes in the coastline of Sungai Nibung so that coastal area management, including abrasion disaster mitigation, can be carried out appropriately. The method used is a quantitative descriptive method from the results of processed NSM and EPR data from DSAS and the results of Landsat image digitization from GEE. The most extensive abrasion phenomenon results will occur in 2023, namely 64,924 m2 and accretion of 120,886 m2. Coastal changes digitized using ArcGIS showed that the coastline change in 2013 was 0.433 km2, in 2016 it was 0.521 km2, in 2019 it was 0.538 km2 and in 2023 it was 0.649 km2. DSAS analysis shows that almost every stretch of beach in Sungai Nibung has experienced abrasion. Abrasion in Sungai Nibung occurred because there were not many wave breakers and damage to mangrove land. The rate of abrasion in Sungai Nibung over 10 years reached -574.96 m.

Keywords: DSAS, EPR, NSM, Google Earth Engine.

Abstrak

Perubahan garis pantai menyebabkan proses terus menerus melalui berbagai proses baik abrasi maupun akresi pantai yang diakibatkan oleh pergerakan sedimen, arus susur pantai. Penelitian ini bertujuan untuk memetakan perubahan garis pantai di Desa Sungai Nibung menggunakan citra multi temporal tahun 2013-2023 dari Google Earth Engine (GEE). Manfaat penelitian ini untuk melihat perubahan pesisir pantai Desa Sungai Nibung maka pengelolaan kawasan pesisir termasuk di dalamnya mitigasi bencana abrasi dapat dilakukan dengan tepat. Metode yang digunakan adalah metode deskriptif kuantitatif dari hasil olahan data NSM dan EPR dari DSAS dan hasil digitasi Citra Landsat dari GEE. Hasil fenomena abrasi paling luas terjadi di tahun 2023 yaitu 64,924 m² dan akresi sebesar 120,886 m². Perubahan pesisir yang digitasi menggunakan ArcGIS diperoleh perubahan garis pantai tahun 2013 sebesar 0,433 km² , tahun 2016 sebesar 0,521 km² , tahun 2019 sebesar 0,538 km² dan tahun 2023 sebesar 0,649 km². Analisis DSAS hampir di setiap ruas pantai di Desa Sungai Nibung mengalami abrasi. Abrasi di Desa Sungai Nibung terjadi akibat belum banyak pemecah ombak dan rusaknya lahan mangrove. Laju abrasi di Desa Sungai Nibung selama 10 tahun mencapai -574,96 m.

Kata Kunci : DSAS, EPR, NSM, Google Earth Engine

Strategy for Sustainable Use of Mangrove Ecosystem In Coastal Tatengesan, Southeast Minahasa Regency

Wed, 13 Dec 2023 00:00:00 +0800

The mangrove ecosystem area in the coastal area of Tatengesan Village, Pusomaen District, Southeast Minahasa Regency has been developed as a mangrove ecotourism area which has been managed by Village-Owned Enterprises (BUMD) since January 2019 with assistance from the Mandiri Rural National Community Empowerment Program (PNPM) team. The development of this mangrove ecotourism activity was stopped for a moment due to the impact of the COVID-19 pandemic, but currently, COVID-19 cases are considered endemic so this mangrove ecotourism activity will be developed again. This research aims to formulate some strategies for the sustainable use of the mangrove ecosystem on the Tatengesan coast, Southeast Minahasa Regency. This research lasted for 5 months, from September 2022 - February 2023. This research used descriptive qualitative methods with survey technique, i.e., in-depth direct interviews with resource persons (respondents). The formulation of priority strategies (key success factors) was analyzed using S.W.O.T and strategy choice analysis. This research produced 9 (nine) priority strategies as academic texts, which can be recommended to governments related to the marine and fisheries sector as elements of public policy-making officials.

Keywords: Tatengesan village, mangrove ecotourism, sustainable use, priority strategies.

Abstrak

Kawasan ekosistem mangrove di wilayah pesisir Desa Tatengesan, Kecamatan Pusomaen, Kabupaten Minahasa Tenggara dikembangkan sebagai kawasan ekowisata mangrove yang dikelola oleh Badan Usaha Milik Desa (BUMD) sejak Januari 2019 dengan pendampingan oleh tim Program Nasional Pemberdayaan Masyarakat (PNPM) Mandiri Perdesaan. Kegiatan ekowisata mangrove ini pengembangannya terhenti sejenak dikarenakan adanya dampak pandemi Covid-19, namun saat ini kasus Covid-19 sudah dianggap endemi sehingga kegiatan ekowisata mangrove ini akan dikembangkan kembali. Tujuan penelitian ini yaitu merumuskan strategi pemanfaatan berkelanjutan ekosistem mangrove ke arah berkelanjutan di pesisir Tatengesan Kabupaten Minahasa Tenggara. Riset ini berlangsung selama 5 bulan, dari September 2022 - Februari 2023. Riset ini menggunakan metode kualitatif deskriptif dengan teknik survei, yaitu wawancara langsung secara mendalam (in-depth interview) kepada narasumber (responden). Perumusan strategi prioritas (faktor kunci keberhasilan) di analisis dengan menggunakan S.W.O.T dan analisis pilihan strategi. Penelitian ini menghasilkan 9 (sembilan) strategi prioritas sebagai naskah akademik, yang dapat direkomendasikan kepada pemerintah terkait pada sektor kelautan dan perikanan sebagai unsur pejabat pembuat kebijakan publik.

Kata kunci: Desa Tatengesan, ekowisata mangrove, pemanfaatan berkelanjutan, strategi prioritas.

Structure of the Seagrass Community, In Poopoh Beach Waters, Tombariri District, Minahasa Regency, North Sulawesi Province

Wed, 13 Dec 2023 00:00:00 +0800

Seagrass are flowering plants (Angiosperms) that are fully adapted to life immersed in the sea. This plant consists of rhizomes, leaves and roots, (Rhizomes are stems that sink and creep horizontally, leave and flower, and grow roots). It is these rhizomes and roots that hold back the waves and currents on seagrass plants. The purpose of this study was to determine seagrass species, species density, relative density, species frequency, relative frequency, species closure, relative closure, important value index, diversity index, domination index and aquatic environmental conditions. There are 4 species of seagrass found in the waters of Poopoh Beach, namely, Thalassia hemprichii, Enhalus acoroides, Halodule pinifolia, Halophila ovalis. The number of stands of seagrass species in the study area ranged from 53-965 individuals, species density (17.67-321.67) individuals/m², relative density (3.98-72.61%), frequency (0.045-0.90), relative frequency (3.57-71.42%), species closure (0.41-7.31), relative coverage (1.04-78.12%), seagrass importance value index in Poopoh Beach waters shows that Thalassia hemprchii has the highest importance value index among the other 3 seagrass species namely (212.85%), diversity index (0.97), species dominance index (0.11-0.44%/m²). Environmental conditions in the waters of Poopoh Beach, which has a temperature range of 38°C, a salinity of 35‰, has a substrate of sand, sand mixed with mud, muddy and coral fragments.

Keywords: Poopoh Beach, Seagrass, Community Structure.

Abstrak

Lamun adalah tumbuhan berbunga (Angiospermae) yang sepenuhnya menyesuaikan diri dengan hidup terbenam dalam laut. Tumbuhan ini terdiri dari rhizoma, daun dan akar, (Rhizoma adalah batang yang terbenam dan merayap secara mendatar, berdaun dan berbunga, serta tumbuh akar). Rhizoma dan akar inilah yang menahan hempasan ombak dan arus pada tumbuhan lamun. Tujuan penelitian ini adalah untuk mengetahui jenis-jenis lamun, kerapatan spesies, kerapatan relatif, frekuensi jenis, frekuensi relatif, penutupan jenis, penutupan relatif, indeks nilai penting, indeks keanekaragaman, indeks dominasi dan kondisi lingkungan perairan. Spesies lamun yang ditemukan diperairan Pantai Poopoh berjumlah 4 spesies yaitu, Thalassia hemprichii, Enhalus acoroides, Halodule pinifolia, Halophila ovalis. Jumlah tegakan spesies lamun dilokasi penelitian berkisar dari 53-965 individu, kerapatan spesies (17,67-321,67) individu/m², kerapatan relatif (3,98-72,61%), frekuensi (0,045-0,90), frekuensi relatif (3,57-71,42%), penutupan jenis (0,41-7,31), penutupan relatif (1,04-78,12%), indeks nilai penting lamun diperairan Pantai Poopoh menunjukkan bahwa Thalassia hemprchii memiliki indeks nilai penting paling tinggi diantara ke 3 spesies lamun lainnya yakni (212,85%), indeks keanekaragaman (0,97), indeks dominasi spesies (0,11-0,44%/m²). Kondisi Lingkungan diperairan Pantai Poopoh yakni mamiliki kisaran suhu 28°C, salinitas 30‰, memiliki substrat pasir, pasir campur lumpur, berlumpur dan patahan karang.

Kata Kunci: Pantai Poopoh, Lamun, Struktur Komunitas.

The Abundance Of Sea Cucumber Species In The Waters Of The Wet Laboratory Of East Likupang, North Minahasa

Christian Andre Horman, Gaspar D. Manu, Joudy R. R. Sangari — Wed, 13 Dec 2023 00:00:00 +0800

Sea cucumbers, or Holothuroidea, are a class within the Echinodermata phylum. All organisms within this class possess characteristic spiny or knobbed skin composed of calcite particles. Several species of sea cucumber are internationally traded fishing commodities. The hunting of sea cucumbers is not only limited to the high-value species but also extends to lower-value species that initially garnered little attention. The sampling method used in this study began with a daytime location survey, followed by sample collection at night during the lowest tide, using a flashlight for illumination. All species of sea cucumbers found in the surveyed areas were collected. Following the collection, sorting was conducted where only two individuals of each morphological type, color, and other similar traits were kept, while the rest were returned to the waters. The sorted samples were then photographed for identification purposes, and to analyze the density of the discovered sea cucumber species, the number of individuals per suspected species was noted. The images of the collected samples were then compared with a guide for species identification. The World Register of Marine Species (WORMS) 2023 guide was used for this purpose. Subsequently, the number of individual species found was analyzed to determine the density of individuals and the abundance of sea cucumber species. The results of the identification process revealed 7 species with a total of 53 individuals.

Keywords: Teripang, Holothuroidea, Likupang

Abstrak

Teripang atau Holothuroidea merupakan salah satu dari kelas Echinodermata. Semuah golongan organisme ini memiliki ciri kulit yang berduri atau yang berbintil atau tersusun dari sat-sat kapur. Beberapa jenis teripang merupakan komoditi perikanan yang diperdaganngkan secara Internasional. Perburuan teripang tidak saja pada jenis-jenis yang berharga mahal, tetapi juga pada jenis-jenis yang berharga murah yang pada awalnya tidak memiliki perhatian.

Metode pengambilan sampel diawali dengan survei lokasi pada siang hari dan pengambilan sampel pada malam hari saat surut terendah dengan menggunakan senter sebagai alat penerang. Spesies yang diambil adalah semua jenis teripang yang ditemukan di perairan tesebut. Setelah teripang terkumpul dilanjutkan dengan penyortiran dimana hanya di ambil dua individu setiap bentuk morfologi, warna dan ciri lainnya yang sama. Sedangkan sisanya dikembalikan ke perairan. Sampel yang telah disortir, lalu difoto untuk keperluan iderntifikasi, kemudian untuk menganalisis kepadatan jenis teripang yang ditemukan dicatat jumlah individu setiap jenis yang điduga merupakan spesies/jenis yang sama. Sampel yang telah diambil foto/gambarnya dicocokkan dengan gambar panduan untuk identifikasi jenis. Panduan untuk mengidentifikasi digunakan WORMS (2023) Selanjutnya jumlah jenis individu yang ditemukan dianalisi untuk mendapatkan kepadatan individu dan kelimpahan spesies teripang. Hasil identifikasi ditemukan 7 spesies dengan jumlah 53 individu.

Katakunci: Teripang, Holothuroidea, Likupang.

Direct Benefit Value Of Coral Reefs Ecosystem in Bahoi Village West Likupang District North Minahasa Regency

Wed, 13 Dec 2023 00:00:00 +0800

The high use of coastal resources especially coral reefs by the people of Bahoi Village can affect the existing ecosystem. This research was conducted in July 2021 in Bahoi Village, West Likupang District, North Minahasa Regency designed to determine the value of direct benefits of the coral reefs ecosystem at the location. The data collected in this study were primary and secondary data. Primary data were obtained by conducting interviews among the fishermen as respondents. The interview was conducted using the purposive sampling method by taking a sample of 30 respondents from fishermen's households in the community. As for secondary data, namely the ecological condition of coral reefs (coral cover), the general condition and population of Bahoi Village were based on YAPEKA 2015 data. The data collected were then tabulated and analyzed using the effect on production (EOP) model to determine the value of the direct benefits of coral reefs. The main livelihood of the people of Bahoi Village is fishermen, which is comprised of 107 people (60% of the total number of households in Bahoi Village. The results show that the community of Bahoi is very dependent on the coastal resources. Based on the result of the EOP analysis technique used the value of direct use benefits obtained from coral reef fisheries is Rp. 379,746,378,-/ha/year.

Keywords: Direct benefits, ecosystem value, Coral reefs

Abstrak

Tingginya pemanfaatan pesisir khususnya terumbu karang oleh masyarakat Desa Bahoi dapat mempengaruhi sumber daya ekosistem yang ada. Penelitian ini dilaksanakan pada bulan Juli 2021 di Desa Bahoi, Kecamatan Likupang Barat, Kabupaten Minahasa Utara dengan tujuan untuk mengetahui nilai manfaat langsung ekosistem terumbu karang di lokasi tersebut. Sumber data yang dikumpulkan dalam penelitian ini menggunakan data primer dan data sekunder. Data primer didapatkan dari hasil wawancara. Wawancara yang dilakukan menggunakan metode purposive sampling dengan mengambil sampel responden sebanyak 30 orang. Sedangkan untuk data sekunder yaitu kondisi ekologi terumbu karang (tutupan karang) Desa Bahoi, Gambaran umum Desa Bahoi dan jumlah penduduk Desa Bahoi. Data yang dikumpulkan selanjutnya dibuat tabulasi dan dilakukan analisis untuk menentukan nilai manfaat langsung dari terumbu karang yang ada di Desa Bahoi. Mata pencaharian utama masyarakat Desa Bahoi adalah nelayan yaitu sebanyak 107 orang (60% dari total jumlah kepala keluarga Desa Bahoi). Dimana menunjukkan bahwa masyarakat Desa Bahoi sangat bergantung pada hasil perairan di Desa Bahoi. Berdasarkan hasil analisis dengan pendekatan EOP, diperoleh nilai manfaat langsung yang didapatkan dari pemanfaatan terumbu karang sebagai perikanan tangkap di Desa Bahoi yaitu sebesar Rp. 379.746.378,-/ha/tahun.

Kata kunci: Manfaat langsung, Nilai, Terumbu karang

Phytoplankton Community Structure in Seagrass Beds of Nain Island Waters

Sat, 23 Dec 2023 00:00:00 +0800

This study aims to identify phytoplankton species, calculate phytoplankton abundance, diversity index, uniformity index, phytoplankton dominance index, and determine environmental conditions such as temperature, pH, salinity, nitrate, and phosphate in the seagrass ecosystem of Nain Island Waters. Sampling includes seawater for the needs of phytoplankton identification measurement of nitrate and phosphate levels and measurement of water parameters in situ. Phytoplankton sampling is done horizontally using a plankton net. Phytoplankton identification found in the seagrass ecosystem of Nain Island Waters consisted of four classes, namely Bacillariophyceae (Rhizosolenia sp.; Nitzschia sp.; Chaetoceros sp.; Navicula sp.; Eucampi sp.; Pleurosigma sp.; Thalassionema sp.; Melosira sp.), Dinophyceae (Ceratium sp.; Protoperidinium sp.), Chlorophyceae (Spirogyra sp.), and Euglenophyceae (Euglena sp.). The calculation of phytoplankton abundance is in the range of 9 - 51 cells/l. The highest abundance was found at station one which was 51 cells/l, then station three which was 21 cells/l, and station two which was 9 cells//I. The diversity index is in the range of 0.8749 - 1.8668 which means there is community instability. The uniformity index is in the range of 0.2226 - 0.8460, while the dominance index is in the range of 0.2060 - 0.6093, this indicates that the water conditions are stable. Environmental conditions (temperature, salinity, pH, nitrate, and phosphate) in the seagrass ecosystem of Nain Island Waters are still quite good for phytoplankton growth.

Keywords: Phytoplankton, Seagrass, Nain Island, Abundance, Biological Index

Abstrak

Penelitian ini bertujuan untuk identifikasi jenis-jenis fitoplankton, menghitung kelimpahan fitoplankton, indeks keanekaragaman, indeks keseragaman, indeks dominasi fitoplankton dan mengetahui kondisi lingkungan seperti suhu, pH, salinitas, nitrat, dan fosfat di ekosistem padang lamun Perairan Pulau Nain. Pengambilan sampel meliputi air laut untuk kebutuhan identifikasi fitoplankton dan pengukuran kadar nitrat dan fosfat perairan serta pengukuran parameter perairan secara In situ. Pengambilan sampel fitoplankton dilakukan secara horizontal dengan menggunakan plankton net. Fitoplankton yang ditemukan terdiri dari empat kelas yaitu Bacillariophyceae (Rhizosolenia sp. Nitzschia sp. Chaetoceros sp. Navicula sp. Eucampi sp. Pleurosigma sp. Thalassionema sp. Thalassionema sp. Melosira sp.), Dinophyceae (Ceratium sp. Protoperidinium sp.), Chlorophyceae (Spirogyra sp), dan Euglenophyceae (Euglena sp). Hasil perhitungan kelimpahan fitoplankton berada di kisaran 9 - 51 sel/l. Kelimpahan tertinggi ditemukan pada stasiun satu yaitu 51 sel/l, kemudian stasiun tiga yaitu 21 sel/l dan stasiun dua yaitu 9 sel/I. Indeks keanekaragaman berada pada kisaran 0,8749 - 1,8668 yang berarti adanya ketidakstabilan komunitas. Indeks keseragaman yaitu pada kisaran 0,2226 - 0,8460, sedangkan indeks dominasi berada pada kisaran 0,2060 - 0,6093, hal ini menunjukkan kondisi perairan dalam keadaan stabil. Kondisi lingkungan (suhu, salinitas, pH, nitrat dan fosfat) di ekosistem padang lamun Perairan Pulau Nain masih cukup baik untuk pertumbuhan fitoplankton.

Kata kunci: Fitoplankton, Padang Lamun, Pulau Nain, Kelimpahan, Indeks Biologi

Efforts To Improve Clean Water Qualitythrough The Community Self-Help Group Program(Case Study Of Ngemplak Village)

Meylawati Dora, Danang Purwanto, Riadi Syafutra Siregar — Sat, 23 Dec 2023 00:00:00 +0800

This research aims to find out, describe and analyze efforts to improve clean water quality through the Community Self-Help Group (KSM) program in Ngemplak Village, Jebres District. The method used is descriptive qualitative which focuses on the AGIL theory of Adaptation, Goal Attainment, Integration, and Latency. To improve people's living standards, the government's role is an important effort in the Community-Based Drinking Water and Sanitation Program or PAMSIMAS. There were several obstacles to the PAMSIMAS program, in the end, the village community of Ngemplak, Jebres, Surakarta 2012 attempted to develop a supporting program in the form of a KSM (Community Self-Help Group) program called Warih Tomo which aims to improve community welfare by increasing the provision of clean water sources. which is suitable for consumption. The research results show that the development of the Community Self-Help Group program is in line with Talcott Parsons' functional structural theory where the community has various institutions that are connected so that the system can run well, so the efforts made by the people of Ngemplak Village can improve the quality of clean water by improving conditions in all existing aspects and in collaboration with other aspects of society. Apart from that, stakeholders also apply the AGIL concept well in making efforts to improve the quality of clean water in the village.

Keywords: AGIL, Clean Water, KSM, Pamsimas

Abstrak

Penelitian ini bertujuan untuk mengetahui, mendeskripsikan, serta menganalisis terkait upaya peningkatan kualitas air bersih melalui program Kelompok Swadaya Masyarakat (KSM) yang berada diKampung Ngemplak, Kecamatan Jebres . Metode yang digunakan ialah deskriptif kualitatif yang berfokus pada teori AGIL Adaptasi (Adaptation), Goal Attainment (Pencapaian Tujuan), Integration (Integrasi), Latency (Pemeliharaan Pola). Guna meningkatkan taraf hidup masyarakat, peran pemerintah menjadi upaya penting dalam Program Penyediaan Air Minum dan Sanitasi Berbasis Masyarakat atau PAMSIMAS. Adanya beberapa kendala dari program PAMSIMAS, pada akhirnya masyarakat desa Ngemplak, Jebres, Surakarta pada tahun 2012 berupaya untuk mengembangkan program pendukung berupa program KSM (Kelompok Swadaya Masyarakat) yang diberi nama Warih Tomo yang memiliki tujuannya meningkatkan kesejahteraan masyarakat dengan cara meningkatkan penyediaan sumber air bersih yang layak konsumsi. Hasil penelitian didapat bahwa pengembangan program Kelompok Swadaya Masyarakat sejalan dengan teori fungsional structural Talcott Parsons dimana masyarakat memiliki berbagai kelembagaan yang saling terhubung satu dengan yang lainnya agar sistem dapat berjalan dengan baik maka upaya yang dilakuykan masyarakar Kampung Ngemplak tersebut dapat meningkatkan kualitas air bersih adalah dengan memperbaiki keadaan di segala aspek yang ada dan bekerjasama dengan aspek masyarakat lainnya. Selain itu para stakeholder juga menerapkan konsep AGIL dengan baik dalam melakukan upaya peningkatan kualias air bersih di Desa tersebut.

Kata Kunci: AGIL, Air Bersih, KSM, Pamsimas

Flood Disaster Adaptation In Mentawai District Based On Local Wisdom: Comparative Study Of Disaster-Friendly Houses (Uma)

Sat, 23 Dec 2023 00:00:00 +0800

In the last decade, the intensity and quality of disaster threats in the Islands Mentawai have been the tallest. Experience has given birth to local wisdom in adapting to natural disasters, especially flood problems. One of the local pearls of wisdom possessed by the Mentawai people to adapt to floods is disaster-friendly houses ( Uma ). So this article was constructed to examine Uma's axiology in dealing with floods. The research method used is a qualitative approach, where data collection techniques use interviews and observation. In-depth interviews were conducted with two different community groups, namely the elite group and the lay community group consisting of 3 elite groups; traditional leaders, religious leaders, community leaders, and 20 general public groups. Data validation was carried out using triangulation techniques and analyzed through data reduction, data presentation, and concluding/verification. Research findings show that Uma has strong adaptive and mitigating powers in dealing with flood disasters. Uma can be compared to the construction of developed countries such as Japan, the Netherlands, and England in adapting to flood risks. Increasingly complex climatic conditions, together with the consequences of inappropriate tourism expansion and weak land use management, have led to an increase in the frequency and severity of flooding in the Mentawais – saltwater intrusion, temperature changes, weather changes, and landslides. The Mentawai region is increasingly vulnerable to the risk of saltwater intrusion, which affects the ability to supply clean water and develop regional infrastructure. Rainfall combined with higher tides has caused an increase in the extent of flooding, especially in the lowland areas of Mentawai Regency

Keywords : Flood Disaster Adaptation ; Uma ; Local wisdom ; Mentawai

Biometrics and Reproduction of Redbelly Yellowtail fusilier Caesio cuning (Bloch, 1791) in Guraping Bay, Halmahera Island, Indonesia

Sat, 23 Dec 2023 00:00:00 +0800

This study aims to analyze the biometrics of yellowtail fish (length-weight relationship, growth patterns, condition factors, length-fecundity relationship) and reproductive aspects (gonadal maturity level, gonadal maturity index, and fecundity). The yellowtail fish sample used in this study was taken from fishermen's catches in April 2023. A total of 73 male individuals 17.0-29.9 cm total length, 62.00-356.00 gram, 77 female individuals 17.5-8 .1 cm total length, weight 69.88-288.00 grams. Male length-weight relationship W= 0.0140L^2.9662 R2= 0.9812, isometric growth pattern. Female W= 0.0166L^2.9104, R²= 0.9633, growth pattern isometric. Condition factor 1.00 ± 0.06 for males and 1.00 ± 0.07 for females. Gonadal maturity levels I, II, III, IV and V for both males and females with the number of individuals at TKG I 65, II 26, III 25, IV 24, and V 10 individuals. The gonadal maturity index with the highest average value was 1.08 ± 0.47 at TKG IV. Fecundity ranged from 1.771-68.425 which was calculated on 28 fish samples with a mean ± SD of 20.158 ± 19.110. Biometric relationship with fecundity F = 102.67L^0.1955, R² = 0.0789 shows a very weak relationship between length and fecundity.

Keywords: Length-weight, condition factor, maturity, gonad index, fecundity.

Abstrak

Penelitian ini bertujuan untuk menganalisis biometrik ikan ekor kuning (hubungan panjang-berat, pola pertumbuhan, faktor kondisi, hubungan panjang-fekunditas) dan aspek reproduksi (tingkat kematangan gonad, indeks kematangan gonad, dan fekunditas). Sampel ikan ekor kuning yang digunakan dalam penelitian ini diambil dari tangkapan nelayan pada bulan April 2023. Sebanyak 73 individu jantan 17,0-29,9 cm panjang total, 62,00-356,00 gram, 77 individu betina 17,5-8,1 cm panjang total, berat 69,88-288,00 gram. Hubungan panjang-berat jantan W= 0,0140 L ^2,9662 R2= 0,9812, pola pertumbuhan isometrik. Betina W= 0,0166L^2,9104, R2 = 0,9633, pola pertumbuhan isometrik. Fakotor kondisi 1,00±0,06 untuk jantan dan betina 1,00±0,07. Tingkat kematangan gonad I, II, III, IV dan V baik jantan maupun betina dengan jumlah individu pada TKG I 65, II 26, III 25, IV 24, dan V 10 individu. Indeks kematangan gonad dengan nilai rata-rata tertinggi yaitu 1,08±0,47 pada TKG IV. Fekunditas berkisar pada 1.771-68.425 yang dihitung pada 28 sampel ikan dengan rata-rata ± SD 20.158 ±19.110. Hubungan biometrik dengan fekunditas F = 102,67L^0,1955, R² = 0,0789 menunjukkan hubungan yang sangat lemah antara panjang dan fekunditas.

Kata Kunci: Panjang-berat, faktor kondisi, kematangan gonad indeks, fekunditas.

The Relationship Of Clean Water And Environmental Sanitation To The Incident Of Diarrhea: Systematic Review

Dewi Rahmadani Siregar, Abdul Razak, Elsa Yuniarti, Linda Handayuni — Sat, 23 Dec 2023 00:00:00 +0800

Indonesia is one of the developing countries that experiences diarrhea problems. This is because of its high morbidity and mortality. Diarrhea is an endemic disease that has the potential to cause Extraordinary Events (KLB) which are often accompanied by death in Indonesia. Most diarrheal diseases can be prevented through safe drinking water and adequate sanitation and hygiene. This study aims to determine the relationship between environmental sanitation and the incidence of diarrhea in toddlers. This research uses a systematic review method (Systematic Review) which is a research method for identifying, evaluating, and interpreting research results that are relevant to a particular research topic, or phenomenon that is the focus of the research. The results of this research show that there is a relationship between environmental sanitation such as the physical quality of water, ownership of a toilet, type of floor in the house, and the incidence of diarrhea. It is hoped that after this research is carried out, mothers and health policy stakeholders such as the health department and community health centers can improve residential environmental health programs to have physically clean water quality and good environmental sanitation.

Keywords: Environmental Sanitation, Diarrhea, Toddlers, Systematic Review

Quality of Demersal Fish sold at Tobelo Traditional Market, North Halmahera based on pH and Organoleptic Values

Febrina Olivia Akerina, Femsy Kour, Yutita L. N. Hibata — Thu, 28 Dec 2023 00:00:00 +0800

Demersal fish resources are a type of fish whose life cycle is mostly at the bottom or around the bottom of the waters. Fishery products are food commodities that quickly spoil (deteriorate in quality) because they are influenced by the high water and nutrient content. Fish bodies are a good medium for the growth of putrefactive bacteria. Factors that influence the speed of reduction in fish freshness level are storage temperature. The application of cold chains is one way of handling that is easy to apply. This study aims to analyze the quality of demersal fish sold in one of the traditional markets in the city of Tobelo based on organoleptic and pH. The results of the analysis show that the organoleptic tests of gills, eyes, flesh, smell, and texture of fish meet the requirements of the Indonesian National Standard. The pH value of fish ranges from 6.00 - 6.65 which means fish are still in very good condition.

Keywords: Demersal fish, organoleptic, pH, Tobelo

Abstrak

Sumberdaya ikan demersal merupakan jenis-jenis ikan yang siklus hidupnya sebagian besar berada di dasar atau sekitar dasar perairan. Hasil perikanan adalah komoditas pangan yang cepat mengalami pembusukan (kemunduran mutu) karena dipengaruhi oleh tingginya kandungan air dan nutrisi. Tubuh ikan merupakan media yang baik untuk pertumbuhan bakteri pembusuk. Faktor-faktor yang berpengaruh terhadap kecepatan penurunan tingkat kesegaran ikan adalah suhu penyimpanan. Penerapan rantai dingin merupakan salah satu cara penanganan yang mudah diterapkan. Penelitian ini bertujuan untuk menganalisis kualitas ikan demersal yang dijual di salah satu pasar tradisional di Kota Tobelo berdasarkan organoleptic dan pH. Hasil analisis menunjukkan bahwa Uji organoleptic insang, mata, daging, bau dan tekstur ikan memenuhi persyaratan Standar Nasional Indonesia. Nilai pH ikan berkisar dari 6,00 – 6,65 yang berarti ikan masih dalam kondisi sangat baik.

Kata kunci : Ikan demersal, organoleptic, pH, Tobelo.

Morphology and Anatomy of Macroalgae Community in Rap Rap Coastal Waters, Tongkaina Village, Manado City

Mon, 22 Jan 2024 00:00:00 +0800

Macroalgae are low-level plants that generally grow attached to certain substrates such as corals, mud, sand, rocks, and other hard objects. Macroalgae are algae that have a macroscopic body shape and size. A community is a group of beings living together in the same place. Thus the macroalgae community is a group of lower plants that have macroscopic body sizes living together. The coastal area of Rap-Rap Beach is located in Tongkaina Village, Manado City, North Sulawesi Province. This location is one of the stable macroalgae habitats, meaning that there is still little habitat damage that occurs, so macroalgae can still be obtained directly from nature. This coast is also known as mangrove ecotourism and the path to Bunaken Island. The purpose of this study is to describe the morphology and anatomy of each macroalgae species. Data collection using the Line Transect method with a squared sampling technique was carried out at the lowest low tide. Temperature measurement using a thermometer and salinity using a refractometer, and for determination of substrate visually see the type of substrate.

Keywords: morphology, anatomy, community, macroalgae, Rap Rap.

Abstrak

Makroalga merupakan tumbuhan tingkat rendah yang umumnya tumbuh melekat pada substrat tertentu seperti pada karang, lumpur, pasir, batu dan benda keras lainnya. Makroalga yaitu alga yang memiliki bentuk dan ukuran tubuh makroskopik. Komunitas adalah kelompok makhluk yang hidup secara bersama-sama dalam suatu tempat yang bersamaan. Dengan demikian komunitas makroalga adalah kelompok tumbuhan rendah yang memiliki ukuran tubuh makroskopik yang hidup bersamaan. Wilayah pesisir Pantai Rap-Rap terletak di Kelurahan Tongkaina, Kota Manado, Provinsi Sulawesi Utara. Lokasi ini merupakan salah satu habitat makroalga yang stabil artinya masih sedikit kerusakan habitat yang terjadi, sehingga makroalga masih dapat diperoleh secara langsung dari alam. Pesisir ini juga dikenal sebagai ekowisata mangrove dan jalur ke Pulau Bunaken. Tujuan penelitian ini adalah mendeskripsikan morfologi dan anatomi masing-masing spesies makroalga. Pengambilan data menggunakan metode Line Transect dengan teknik sampling kuadrat yang dilakukan pada saat surut terendah. Pengukuran suhu menggunakan Thermometer dan salinitas menggunakan Refraktometer, dan untuk penentuan substrat dilihat secara visual jenis dari substrat tersebut.

Kata kunci: morfologi, anatomi, komunitas, makroalga, Rap Rap.

Length Increase and Survival Rate of Coral Isopora palifera which Transplanted on Concrete Block

Mon, 22 Jan 2024 00:00:00 +0800

Efforts to mitigate damage to coral reef ecosystems can be made by developing techniques for coral transplantation. The purpose is to know the survival rate of coral Isopora palifera and Measure the length increase of coral Isopora palifera using the Image-J application as the measurement. The research method was that artificial blocks made of concrete were used as containers for the installation of 27 colonies of coral Isopora palifera. Data collection in the field in the form of colonies that were successfully transplanted to artificial reef units will be explored using a camera from each concrete block which will take perpendicular pictures and colony portraits from each artificial reef unit. The results are then analyzed using the Image-J application. The transplantation results survival rate in Isopora palifera coral colonies in Paputungan village is 66.6% of 100%, while the Isopora palifera coral colony increase length was around 1.51 mm/5 months or 0.302 mm/month.

Keywords: Coral, Isopora palifera, Transplant, Concrete block, North Sulawesi

Abstrak

Upaya penanggulangan kerusakan ekosistem terumbu karang dapat dilakukan dengan menggembangkan teknik transplantasi karang. Tujuan adalah Mengetahui tingkat ketahanan hidup karang Isopora palifera dan Mengetahui laju pertambahan karang Isopora palifera dengan menggunakan aplikasi Image-J sebagai pengukuran pertumbuhan. Metode penelitian yaitu balok buatan dari beton dijadikan wadah tempat pemasangan karang Isopora palifera sebanyak 27 koloni. Pengambilan data di lapangan berupa koloni yang berhasil ditransplantasi ke unit terumbu buatan akan didokumentasikan menggunakan kamera dari tiap-tiap balok diambil gambar tegak lurus dan memotret koloni dari masing-masing unit terumbu buatan. Hasil pemotretan tersebut selanjutnya dianalisa menggunakan aplikasi Image-J. Proses transplantasi di desa Paputungan menghasilkan 66,6% dari 100% tingkat kelangsungan hidup pada koloni karang Isopora palifera, sedangkan untuk laju pertabahan koloni karang Isopora palifera berada disekitar 1,51 mm/5 bulan atau 0,302 mm/bln.

Kata Kunci: Karang, Isopora palifera, Transplantasi, Balok beton, Sulawesi Utara.

Macroalgae Communities In The Waters Of Tateli Village, Mandolang, And Mokupa Village Waters, Tombariri, Minahasa District, North Sulawesi Province

Mon, 22 Jan 2024 00:00:00 +0800

On the coast of Beton Panjang and Tasik Ria, there are tidal flats with white sand substrates and some seagrass beds (seagrass) and macroalgae. Until now, there is still limited research on macroalgae in Beton Panjang and Tasik Ria. However, studies on macroalgae, especially aspects of their anatomical characteristics, have not been carried out. Therefore, it is necessary to study the anatomical characteristics and structure of the community. Sampling was carried out at the lowest ebb with the help of an application (to find out the lowest ebb time). They are laying transects at each location for macroalgae data collection as many as 3 transect lines 50 m long drawn perpendicularly from the coast towards the sea with the assumption that the community is evenly distributed. The distance between transects is 30 m with a squared distance of 5 m. Each square is used for data collection measuring 1 x 1 m². Analysis of the density index and relative density in Beton Panjang coastal waters yielded a density value of 0.06 ind.m² – 0,43 ind./m². The lowest density value is in the speciesLaurencia papillosa and the highest is in speciesPadina australis With a total density of individuals per species of 0.43 ind./m². In the coastal waters of Tasik Ria, the highest density index is for species Neomeris annulled with a value of 0.63 ind./m². The highest diversity index value is in the coastal waters of Tasik Ria with a value of H' = 2.33, while the highest dominance index is in the coastal waters of Beton Panjang with a dominance value of D = 0.16. The highest wealth and equity values are in the coastal waters of Tasik Ria with a value of d = 2.27 and E = 0.94.

Keywords: macroalgae, Beton Panjang, Tasik Ria, anatomical characteristics

Abstrak

Di pesisir Beton Panjang dan Tasik Ria terdapat rataan pasang surut dengan substrat pasir putih dan beberapa hamparan lamun (seagrass) serta makroalga. Sampai saat ini, masih terbatas penelitian tentang makroalga di Beton Panjang dan Tasik Ria. Namun, kajian mengenai makroalga khususnya aspek karakteristik anatomi belum dilakukan. Oleh sebab itu, perlu dilakukan kajian karakteristik anatomi dan juga struktur komunitasnya.Pengambilan sampel dilakukan pada saat surut terrendah dengan bantuan aplikasi Tides (untuk mengetahui waktu surut terrendah). Peletakan transek pada masing-masing lokasi untuk pengambilan data makroalga sebanyak 3 garis transek sepanjang 50 m yang ditarik tegak lurus dari pantai ke arah laut dengan asumsi bahwa penyebaran komunitas merata. Jarak antar transek yaitu 30 m dengan jarak kuadrat yaitu 5 m. Setiap kuadrat dipakai untuk pengambilan data berukuran 1 x 1 m². Analisi indeks kepadatan dan kepadatan relatif di perairan pesisir Beton Panjang di dapat nilai kepadatan 0,06 ind.m² – 0,43 ind./m². Nilai kepadatan terendah ada pada spesies Laurencia papillosa dan yang tertinggi ada pada spesies Padina australis Dengan jumlah kepadatan individu perjenis 0,43 ind./m². Pada perairan pesisir Tasik Ria, indeks kepadatan tertinggi ada pada spesies Neomeris annulata dengan nilai 0,63 ind./m². Nilai indeks keanekaragaman tertinggi ada pada pada perairan pesisir Tasik Ria dengan nilai H’= 2,33, sedangkan untuk indeks dominasi tertinggi ada pada perairan pesisir Beton Panjang dengan nillai dominasi D=0,16. Untuk nilai kekayaan dan kemerataan tertinggi ada pada perairan pesisir Tasik Ria dengan nilai d= 2,27 dan E= 0,94.

Katakunci: makroalga, Beton Panjang, Tasik Ria, karakteristik anatomi.

Identification of Types and Weight of Marine Debris in Each Season at Ancol Gen Beach, Pesawahan, Teluk Betung Selatan, Bandar Lampung

Arda Kurnia, Henni Wijayanti Maharani, Putu Cinthia Delis — Thu, 25 Jan 2024 00:00:00 +0800

The Ancol Gen Beach is one of the beaches located in the waters of Lampung Bay, offering a variety of activities in the surrounding aquatic environment. These activities have led to an increase in pollution, particularly in the form of marine debris. The distribution of non-submerged marine debris tends to drift and ultimately ends up along the shoreline. This research was conducted from December 2021 to June 2022 at Ancol Gen Beach, Pesawahan, Teluk Betung Selatan, Bandar Lampung. The study aimed to classify and identify the types and weights of marine debris most commonly found at Ancol Gen Beach. Sampling of marine debris was carried out using the line transect method spanning the coastline. The research results revealed that the dominant type of marine debris was single-use plastic, followed by recyclable plastics, textiles, rubber, paper, glass, wood, metal, and hazardous waste (B3). The highest density of marine debris occurred during the rainy season, with a count of 50,020 pcs/m² and a weight of 160,525 g/m². In contrast, the lowest density of marine debris was observed during the dry season, with 15,450 pcs/m² and a weight of 53,250 g/m². The accumulation of macro marine debris along Ancol Gen Beach is suspected to be transported by surface currents and river flows in the vicinity of the shoreline.

Keywords: Ancol Gen, Macro-sized, Marine debris, and Seasson.

Abstrak

Pantai Ancol Gen merupakan salah satu pantai yang berada di perairan Teluk Lampung yang memiliki beragam aktivitas di sekitar perairan tersebut. Aktivitas-aktivitas yang ada menyebabkan peningkatan pencemaran salah satunya berupa sampah laut. Distribusi sampah laut yang tidak tenggelam ke dasar perairan akan hanyut dan berakhir di sepanjang pantai. Penelitian ini dilaksanakan pada bulan Desember 2021- Juni 2022 dan bertempat di Pantai Ancol Gen, Pesawahan, Teluk Betung Selatan, Bandar Lampung. Penelitian bertujuan untuk mengklasifikasi dan mengidentifikasi jenis-jenis serta berat sampah laut yang paling banyak ditemukan di Pantai Ancol Gen. Pengambilan sampel sampah laut menggunakan metode line transek yang membentang sepanjang pantai. Hasil penelitian menunjukkan bahwa jenis sampah laut didominasi oleh sampah jenis plastik sekali pakai, kemudian diikuti oleh sampah plastik daur ulang, tekstil, karet, kertas, kaca, kayu, logam, dan sampah B3. Kepadatan jumlah sampah laut paling tinggi berada di musim hujan sebanyak 50.020 pcs/ m² dan berat sampah laut sebesar 160.525 g/m², sedangkan kepadatan jumlah sampah laut terendah di musim kemarau sebanyak 15.450 pcs/m² dan berat sampah laut sebesar 53.250 g/m². Akumulasi sampah laut makro yang tersebar di sepanjang Pantai Ancol Gen diduga terbawa oleh arus permukaan laut dan aliran sungai yang berada di sekitar pantai tersebut.

Kata Kunci : sampah laut, makro, musim, pantai Ancol Gen.

Gastropods in tidal of Bulo, Mandolang District, North Sulawesi

Thu, 25 Jan 2024 00:00:00 +0800

A tidal area is a part of the coast that is influenced by the rise and fall of the tides. The area is a dynamic area, which experiences exposure to the air when low tide comes, easily mixed with fresh water in the rainy season and inundation. Marine flora and fauna that live in the area can adapt to it. The purpose of this study was to identify gastropod species and the density of each species that were found attached to the hard substratum in the tidal area of Bulo, Mandolang District, North Sulawesi. Data were collected by line transect and squared methods. Gastropod samples obtained were treated by using 70% alcohol. The length of each species was measured before being identified at the species level. The results show 175 individuals consisting of 30 species from 14 families were recorded. Substrat of rock and dead coral were covered and dominated the intertidal bottom. The highest density of Gastropods in the tidal area of Bulo, Mandolang District, North Sulawesi was the species of Cellana radiata. The density of Cellana radiata was 3.8 ind./m², while for the other 20 species of gastropods, each species was 0.07 ind./m². Physical and biological factors that affected the presence and density of gastropod species are discussed.

Keywords: Gastropods; Density; Tidal; Mollusc; Bulo Village.

Abstrak

Daerah pasang surut adalah salah satu daera di pesisir yang dipengaruhi oleh air pasang tinggi dan rendah. Daerah ini adalah sebagai daerah yang dinamamis, di mana adalah daerah yang terekspos dengan sinar matahari pada saat pasang rendah, mudah bercampur dengan air tawar di saat musium hujan, serta daerah yang mudah dijangkau oleh masyarakat pensisir. Biota yang hidup di daerah ini memiliki kemampuan beradaptasi dengan perubahan-perubahan lingkungan ini. Tujuan penelitian ini adalah mengidentifikasi jenis-jenis Gastropoda dan mengetahui kepadatan jenis-jenis Gastropoda, yang menempati substrat keras di daerah pasang surut Bulo Kecamatan Mandolang, Sulawesi Utara. Pengumpulan data adalah dengan menggunakan metode ‘line transect’ dan kuadrat. Sampel Gastropoda yang didapatkan diberi alkohol 70%, Panjang masing-masing spesies diukur sebelum diidentifikasi pada tingkat spesies. Hasil penelitian menunjukkan bahwa ada 175 individu yang terdiri dari 30 spesies dari 14 famili. Kepadatan tertinggi Gastropoda di daerah pasang surut Bulo Kecamatan Mandolang, Sulawesi Utara adalah Cellana radiata yang memiliki kepadatan 3.8 ind./m², sedangkan 20 jenis Gastropoda lainnya memiliki kepadatan untuk setiap jenis, yaitu 0.07 ind./m².

Kata kunci: Gastropoda; Kepadatan; Pasang Surut; Moluska; Desa Bulo.

Attachment Of Macrobenthos Larvae To Organic And Non-Organic Substrates

Fri, 26 Jan 2024 00:00:00 +0800

The objectives of this study are 1) to Identify the specimen of macrobenthos attached to the substrate provided in 2 locations. 2) to determine the type of substrate attached by the larvae at both sites. 3) to determine the density of Macrobenthos attached to the substrate provided at 2 sites. A plywood plate had 16 holes with a diameter of 1 cm each that had been randomly filled with organic substrates, namely coconut fibers, palm fibers, shells with 'bysus' threads, and non-organic substrates in the form of plastic ropes. Each substrate has four replicates. The plywood plate with 3 replicates was placed in each station. The plate was removed and taken to the laboratory after 1 month. The identification up to family, genus, and species as well as the density of each species were applied. The results showed that not only the larvae of Septifer bilocularis attached to organic and non-organic substrates, but six species of larvae were also identified. The sizes of new settler macrobenthos from 2 mm to 1 cm attached on organic and non-organic substrates were identified. The density of new settlers species attached to substrates varied from 0.03 – 0.5 individuals/cm². The new settlers identified 7 species in Tiwoho and 3 species in Malalayang.

Keywords: Settlement, Substrate, Tiwoho Coast, Malalayang Coas.

Abstrak

Tujuan dari penelitian ini adalah 1) Mengidentifikasi jenis-jenis makrobenthos yang menempel pada substrat yang disediakan di 2 lokasi. 2) Mengidentifikasi jenis substrat sebagai tempat penempelan larva macrobenthos di kedua lokasi, dan 3) Menentukan kepadatan jenis Makrobenthos pada substrat yang disediakan di 2 lokasi. Triplek (plate) memiliki 16 lubang dengan ukuran diameter masing-masing 1 cm yang telah diisi secara acak dengan substrat organik yaitu serabut kelapa, serabut ijuk, cangkang ber ‘byssus’, serta substrat non organik berupa tali plastik. Masing-masing substrat ini memiliki 4 ulangan. Selanjutnya, plate, masing-masing dengan 3 ulangan ditempatkan di setiap intertidal, Towoho dan Malalayang. Plate diangkat setelah 1 bulan, yang dibawah ke laboratorium untuk foto dan diidentifikasi baik di tingkat jenis, genus, ataupun family. Hasil penelitian menunjukkan bahwa tidak hanya larva kerang Septifer bilocularis (Linnaeus, 1758), yang menempel pada substrat organik dan non organik, tetapi ditemukan larva macrobenthos lainnya, yaitu 2 jenis dari Cerithum egenum (Gould, 1849), dan Calcarina defranci d'Orbigny, 1826, 2 family/genus, yaitu: Canthocamptidae dan Portunidae, dan 2 klass, yaitu : Polychaeta dan Demospongae. Teridentifikasi jenis larva makro benthos yang baru menempel pada substrat substrat organik dan non-organik dengan ukuran yang bervariasi, yaitu dari 2 mm – 1 cm. Kepadatan jenis macrobenthos yang baru menempel adalah dari 0.03 – 0.5 individu/cm². Ada 7 jenis teridentifkasi di lokasi Tiwoho, dan 3 jenis teridentifkasi di Malalayang

Kata kunci: Penempelan, Substrat, Pesisir Tiwoho, Pesisir Malalayang

Study of Sea Water Quality in Malalayang Beach Walk Area

Wed, 31 Jan 2024 00:00:00 +0800

The city of Manado is famous for its fishery products, but human activities also cause problems of seawater pollution and a decrease in water quality. This study aims to examine the water quality around Malalayang Beach Walk in Manado City with a focus on physical and chemical parameters. The study was conducted at five stations with three repetitions at high and low tide. The results showed that the water temperature was relatively homogeneous, with a range of 30.02-30.29^oC at high tide and 30.39-30.81^oC at low tide. Turbidity is in the range of 20.1-22.5 NTU at high tide and 16.0-21.7 NTU at low tide, exceeding the quality standard. DO values conform to quality standards (5.46-8.07 mg/L at high tide and 5.69-6.32 mg/L at low tide), but TDS reaches 23900-28600 mg. L at high tide and 26600-28600 mg/L at low tide, far from the common values of 1500 mg/L. Salinity values range from 25.02-30.29 ppt at high tide and 30.35-30.50 ppt at low tide. Pollution and degradation need to be better controlled and monitored.

Keywords: Water quality, Temperature, Turbidity, Dissolved oxygen (DO), Total dissolved solids (TDS), Salinity.

Abstrak

Kota Manado terkenal dengan hasil perikanannya, namun aktivitas manusia juga menyebabkan masalah pencemaran air laut dan penurunan kualitas perairan. Penelitian ini bertujuan untuk mengkaji kualitas perairan di sekitar Malalayang Beach Walk Kota Manado dengan fokus pada parameter fisika dan kimia. Penelitian dilakukan di lima stasiun dengan tiga kali pengulangan pada saat air pasang dan surut. Hasil penelitian menunjukkan bahwa suhu perairan relatif homogen, dengan rentang nilai 30,02-30,29^oC saat pasang dan 30,39-30,81^oC saat surut Kekeruhan berada pada rentang 20,1-22,5 NTU saat pasang dan 16,0-21,7 NTU saat surut, melebihi standar baku mutu. Nilai DO sesuai dengan standar baku mutu (5,46-8,07 mg/L saat pasang dan 5,69-6,32 mg/L saat surut), namun TDS mencapai 23900-28600 mg/L saat pasang dan 26600-28600 mg/L saat surut, jauh dari nilai umum 1500 mg/L. Nilai salinitas berkisar antara 25,02-30,29 ppt saat pasang dan 30,35-30,50 ppt saat surut. Pencemaran dan penurunan kualitas perlu dikendalikan dan dipantau secara lebih baik.

Kata Kunci: Kualitas air, Suhu, Kekeruhan, Dissolved oxygen (DO), Total dissolved solids

Mapping Benthic Habitat Distribution and Coral Reef Health Index in Ternate Island and Tidore Island, North Maluku

Simon I. Patty, Jemmy Souhoka, Petrus C. Makatipu, Marenda Pandu Rizqi — Tue, 30 Jan 2024 00:00:00 +0800

Coral reefs are underwater marine organisms whose coverage can be identified using remote sensing technology utilizing satellite imagery. The benthic habitats classification and coral reef health index analysis were carried out on the Ternate and Tidore islands in June 2021. This study aims to map the distribution of benthic habitat as well as calculate the value of the coral reef health index. The processing of satellite imagery data from Landsat 8, using ENVI 5.3 and ArcGIS 10.1 software. The "depth invariant index" algorithm is used in the image sharpening process (Lyzenga, 1981). The maximum likelihood classification technique is used to identify substrate type, with a confusion matrix used to test its accuracy. The coral reef health index assessment is based on the condition of live coral cover, resilience level, and reef fish biomass. The results from water column image classification showed that there were four classes of habitat, i.e. coral, seagrass, sand, and rubble with an overall accuracy value of 85.86% and kappa coefficient of 0.80605. The total area of classified coral reefs is 1152.85 hectares. The coral reef health index values ranged from 2 to 8 with an average of 5, which translates to a moderate percentage of live coral cover, high resilience, and low fish biomass.

Keywords: coral reefs, benthic habitat, health index, Landsat 8 images.

Abstrak

Terumbu karang merupakan objek tutupan bawah air laut yang dapat diidentifikasi menggunakan teknologi penginderaan jauh yakni memanfaatkan citra satelit. Klasifikasi habitat bentik dan analisis indeks kesehatan terumbu karang telah dilakukan di pulau Ternate dan pulau Tidore pada bulan Juni 2021. Penelitian ini bertujuan untuk memetakan sebaran habitat bentik serta mengetahui nilai indeks kesehatan terumbu karang. Pengolahan data citra Landsat 8 dengan perangkat lunak ENVI 5.3 dan ArcGIS 10.1. Proses penajaman citra menggunakan algoritma “depth invariant index” (Lyzenga, 1981). Teknik klasifikasi maximum likelihood digunakan untuk identifikasi objek dasar perairan dan uji akurasi menggunakan confusion matrix. Penilaian indeks kesehatan terumbu karang berdasarkan kondisi tutupan karang hidup, tingkat resiliensi dan biomassa ikan karang. Hasil klasifikasi citra kolom air mendapatkan empat kelas habitat yaitu karang, lamun, pasir dan pecahan karang mati (rubble) dengan nilai akurasi keseluruhan sebesar 85,86 % dan koefisien kappa sebesar 0,80605. Total luasan area terumbu karang hasil klasifikasi adalah 1152,85 ha. Nilai indeks kesehatan terumbu karang berkisar antara 2 sampai 8, dengan rata-rata 5 yang menggambarkan persentase tutupan karang hidup sedang, tingkat resiliensi tinggi dan biomassa ikan rendah.

Kata kunci: terumbu karang, habitat bentik, indeks kesehatan, citra Landsat 8.

Checklist of Mangrove Snails (Mollusca: Gastropoda) in the Coastal of Sungai Nyirih Village West Kalimantan

Ikha Safitri, Mega Sari Juane Sofiana, Adrian Maulana — Tue, 30 Jan 2024 00:00:00 +0800

Desa Sungai Nyirih is located in Jawai District, Sambas Regency, West Kalimantan. This village is a coastal with the potential for mangrove forests and a diversity of biota such as snail (mollusks: gastropods). Snails are one of the biota that are consumed in various ways by the local community. Gastropods play an important role in the food chain. Apart from that, this biota is a bioindicator of the quality of the waters. Data collection on snail species in the mangrove ecosystem of Desa Sungai Nyirih Village is not yet available. Therefore, this research aims to identify the types of snails (Gastropoda) found in Desa Sungai Nyirih, Sambas. Snail samples were collected using an exploration method throughout the mangrove ecosystem. The species of sample was identified. They were Cassidula aurisfelis, Cassidula nucleus, Pirenella cingulata, Cerithidea obtusa, Ellobium sp., Neripteron violaceum, dan Littoraria melastonoma, Littoraria albicans, and Littoraria scabra.

Keywords: gastropods, Cassidula, Pirenella, Cerithidea, Neripteron, Ellobium, Littoraria

Abstrak

Desa Sungai Nyirih secara adminitrasi terletak di Kecamatan Jawai, Kabupaten Sambas, Kalimantan Barat. Desa ini merupakan salah satu desa pesisir dengan potensi hutan mangrove dan keanekaragaman biotanya, salah satunya adalah keong (moluska: gastropoda). Keong adalah salah satu biota yang dikonsumsi dengan pengolahan yang beraneka ragam oleh masyarakat setempat. Gastropoda berperan penting dalam rantai makanan. Selain itu, biota ini merupakan bioindikator kualitas suatu perairan. Pendataan jenis keong di ekosisten mangrove Desa Sungai Nyirih belum tersedia. Oleh karena itu, penelitian ini bertujuan untuk mengidentifikasi jenis keong (Gastropoda) yang ditemukan pada Desa Sungai Nyirih, Sambas. Pengumpulan sampel keong dilakukan dengan metode eksplorasi di seluruh ekosistem mangrove. Sampel kemudian diidentifikasi jenisnya. Genus yang ditemukan adalah Cassidula aurisfelis, Cassidula nucleus, Pirenella cingulata, Cerithidea obtusa, Ellobium sp., Neripteron violaceum, dan Littoraria melastonoma, Littoraria albicans, dan Littoraria scabra.

Kata kunci: gastropoda, Cassidula, Pirenella, Cerithidea, Neripteron, Ellobium, Littoraria

The Relationship Between Length and Weight of Sardine Fish, Sardinella spp

Fransine B. Manginsela, Anneke V. Lohoo, Ridwan Lasabuda, Yogi Rustandi — Tue, 30 Jan 2024 00:00:00 +0800

Fish are vertebrates that live all or part of their lives in water, breathe with gills, are equipped with fins for movement and balance, and are cold-blooded (poikilotherm). Lemuru fish are grouped into fish (poikilotherm). Lemuru fish are grouped in the order Cluipeiformes which is part of small pelagic fish. The research was carried out in January-August 2023 to determine the diversity of total length and weight as well as the relationship between the length and weight of male and female lemuru fish, which was carried out using quantitative descriptive methods. Of the 135 lemuru fish individuals observed, there were 40 male individuals with a total length of between 13,184-15,589 cm and 95 female individuals which were longer between 12,083-16,420 cm, and the weight of male individuals between 17,450 - 43,040 grams and female individuals were 19,630 - 52,470 grams. The length-weight regression equation for females is W = 0.018204 L ^2.76026 and for males W = 0.01179 L ^2.89363..

Keywords: panjang , small pelagic, growth status.

Abstrak

Ikan adalah vertebrata yang seluruh atau sebagian hidupnya di air, bernafas dengan insang, dilengkapi sirip untuk pergerakan dan keseimbangannya serta berdarah dingin (poikilotherm). Ikan lemuru dikelompokkan pada adalah ikan (poikilotherm). Ikan lemuru dikelompokkan pada ordo Cluipeiformes yang menjadi bagian ikan pelagis kecil. Penelitian dilaksanakan pada bulan Januari-Agustus 2023 bertujuan menentukan keragaman panjang total dan berat serta hubungan panjang berat ikan lemuru jantan dan betina yang pelaksanaannya menggunakan metode deskriptif kuantitatif. Dari 135 individu ikan lemuru yang diamati ada 40 individu jantan dengan panjang total selang 13,184-15,589 cm dan 95 individu betina yang lebih panjang selang 12,083-16,420 cm, dan berat individu jantan selang 17,450 - 43,040 gram dan selang individu betina 19,630 – 52,470 gram. Persamaan regresi panjang-berat betina adalah W = 0.018204 L ^2,76026 dan jantan W = 0.01179 L ^2,89363.

Kata kunci: panjang, berat, regresi, korelasi, Bitung.

Status and Condition of Mangroves in Mangrove Ecosystem on Tongkeina Coast Bunaken National Park

Tue, 05 Mar 2024 00:00:00 +0800

Mangrove ecosystems are a typical type of vegetation found in tropical coastal areas. Mangrove vegetation generally thrives in gently sloping coastal areas near river mouths and beaches that are protected from wave forces. The mangrove forest ecosystem is a nursery ground for young fauna (juvenile stage) that will grow into adult individuals and is also a spawning ground for several animals and other aquatic biota such as birds, insects, snakes, shrimp, fish, and shellfish. This research was conducted at 3 different points. The results showed that there were 6 types of mangroves at the three stations including Soneratia alba, S. ovata, Rhizophora apiculata, R. stylosa, Avicennia marina, and A. alba. High diversity (H') is found at Station 2 and Station 3 at 0.4 and Station 1 at 0.2 with a Dominance value (D) Medium at Station 1 at 0.37 while Stations 2 and 3 at 0.27 and 0.28 are categorized as low, Uniformity (e) at all stations is high with values of 0.74, 0.89 and 0.70, absolute density is highest at Station-1 and Station-2 with a value of 0.10%, and at Station-3 the lowest Absolute Density is 0.06%, Community Similarity (IS) mangrove species at all three locations are the same because they still cover the same location in the intertidal area.

Keywords: Community structure, Mangrove, Tongkeina.

Abstrak

Ekosistem mangrove merupakan tipe vegetasi khas yang terdapat di daerah pantai tropis. Vegetasi mangrove umumnya tumbuh subur di daerah pantai yang landai di dekat muara sungai dan pantai yang terlindung dari kekuatan gelombang. Ekosistem hutan mangrove merupakan daerah asuhan (nursery ground) fauna-fauna muda (juvenile stage) yang akan bertumbuh kembang menjadi individu dewasa dan juga merupakan daerah pemijahan (spawning ground) beberapa satwa dan biota perairan lain seperti burung, serangga, ular, udang, ikan dan kerang-kerangan.Penelitian ini dilakukan di 3 titik yang berbeda. Hasil penelitian menunjukan terdapat 6 jenis mangrove pada ketiga stasiun di antaranya Soneratia alba, S. ovata, Rhizophora apiculata, R. stylosa, Avicennia marina dan A. alba. Keanekaragaman tinggi (H’) terdapat pada Stasiun 2 dan Stasiun 3 0,4 serta Stasiun 1 0,2 dengan nilai Dominansi (D) dikategorikan sedang pada Stasiun 1 0,37 sedangkan Stasiun 2 dan 3 0,27 dan 0,28 dikategorikan rendah, Keseragaman (e) pada semua stasiun tinggi dengan nilai 0,74, 0,89 dan 0,70, kepadatan mutlak tertinggi pada Stasiun-1 dan Stasiun-2 dengan nilai 0,10%, dan pada Stasiun-3 Kepadatan Mutlak terendah yaitu 0,06%, Kesamaan Komunitas (IS) jenis bakau pada ketiga lokasi sama karena masih mencakup satu lokasi yang sama di daerah intertaidal.

Kata kunci : Struktur komunitas, Mangrove, Tongkeina.

Plankton Community Structure In Halmahera Barat Coastal Zone

Sat, 09 Mar 2024 00:00:00 +0800

Research on plankton organisms in supporting aquatic resource management is very important to do. This study aims to see the structure of the plankton community in the coastal waters of West Halmahera Regency. There were 9 sampling sites, namely the waters of Toniku (TO), Tewe (TW), Dodinga (DG), Tuada (TU), Porniti (PR), Payo (PA), Bobo (BO), Sahu (SH), and Ibu (IB). Plankton observations used the Census-SRC method. The parameters observed were abundance, diversity index, uniformity index, and dominance index. The results showed that the highest phytoplankton abundance was found in the TO area, namely 1.7 x 107 cells/m3 and the lowest was 4.1 x 106 cells/m3 in the PR area. The highest phytoplankton diversity index was found in the PR area, namely 2.075 and the lowest was 1.429 in the IB area. The highest uniformity index of phytoplankton was found in the PR area, namely 0.901 and the lowest was 0.624 in the BO and DG areas. The highest phytoplankton dominance index was found in the IB area, namely 0.350 and the lowest was 0.138 in the PR area. The highest zooplankton abundance was found in the DG area at 2.0 x 106 cells/m3 and the lowest was 3.3 x 105 cells/m3 in the IB area. The highest zooplankton diversity index was found in the TU area, namely 1.981 and the lowest was 1.516 in the IB area. The highest uniformity index of zooplankton was found in the IB area, namely 0.942 and the lowest was 0.761 in the DG area. The highest zooplankton dominance index was found in the BO area, namely 0.266 and the lowest was 0.167 in the TU area. The conclusion of this study revealed that the most common type of plankton found was Bacillariophyceae. While the diversity value shows moderate diversity, the uniformity value shows a high level of uniformity, and the dominance value shows low-moderate dominance.

Keywords: Diversity index; Uniformity index; Dominance index; Abundance; Plankton

Abstrak

Penelitian tentang organisme plankton dalam mendukung pengelolaan sumberdaya perairan sangat penting untuk dilakukan. Penelitian ini bertujuan melihat struktur komunitas plankton perairan kawasan pesisir Kabupaten Halmahera Barat. Terdapat 9 lokasi sampling, yaitu perairan Toniku (TO), Tewe (TW), Dodinga (DG), Tuada (TU), Porniti (PR), Payo (PA), Bobo (BO), Sahu (SH), dan Ibu (IB). Pengamatan plankton menggunkan metode Sensus-SRC. Parameter yang diamati adalah kelimpahan, indeks keragaman, indeks keseragaman, dan indeks dominansi. Hasil penelitian menunjukan kelimpahan fitoplankton tertinggi terdapat di kawasan TO yaitu 1,7 x 107 Sel/m3 dan terendah 4,1 x 106 Sel/m3 di kawasan PR. Indeks keragaman fitoplankton tertinggi terdapat di kawasan PR yaitu 2,075 dan terendah 1,429 di kawasan IB. Indeks keseragaman tertinggi fitoplankton terdapat di kawasan PR yaitu 0,901 dan terendah 0,624 di kawasan BO dan DG. Semetara indeks dominansi fitoplankton tertinggi terdapat di kawasan IB yaitu 0,350 dan terendah 0,138 di kawasan PR. Kelimpahan zooplankton tertinggi terdapat di kawasan DG yaitu 2,0 x 106 Sel/m3 dan terendah 3,3 x 105 Sel/m3 di kawasan IB. Indeks keragaman zooplankton tertinggi terdapat di kawasan TU yaitu 1,981 dan terendah 1,516 di kawasan IB. Indeks keseragaman tertinggi zooplankton terdapat di kawasan IB yaitu 0,942 dan terendah 0,761 di kawasan DG. Semetara indeks dominansi zooplankton tertinggi terdapat di kawasan BO yaitu 0,266 dan terendah 0,167 di kawasan TU. Kesimpulan penelitian ini mengungkapkan jenis plankton yang paling banyak ditemukan adalah Bacillariophyceae. Sementara nilai keragaman menunjukkan karagaman sedang, nilai keseragaman menunjukkan tingkat kesergaman tinggi, dan nilai dominasi menunjukkan dominansi rendah – sedang.

Kata kunci: Indeks keragaman; Indeks keseragaman; Indeks dominansi; Kelimpahan; Plankton.

Proximate and Macromineral Content of Gastropods in the Mangrove Area of Desa Bakau Sambas Regency

Warsidah, Ikha Safitri, Mega Sari Juane Sofiana, Oktavia — Thu, 14 Mar 2024 00:00:00 +0800

Gastropods are the largest class of the phylum mollusks, with 75,000 identified species. Gastropods are widely distributed in freshwater, marine waters, and mangrove ecosystems. Gastropods are a fishery commodity with an important economic value containing high protein (36-70.8%) and low fat (0.02-1.50%). This biota has vitamins, essential minerals, omega-3, and omega-6. This research aimed to determine the proximate content (protein, fat, water, ash, and carbohydrates) and macrominerals (Na, K, Mg, Ca, and P) in gastropods found in Bakau Village, Sambas Regency, West Kalimantan. The gastropods found were Ellobium, Cerithidea, and Pirenella. Fifty individuals were taken for proximate analysis. Moisture and ash content were determined by the gravimetric method. Total protein levels were analyzed by the Kjedahl method. The fat content was determined by the Soxhlet method, and the carbohydrate content by the by difference method. Atomic Absorption Spectrophotometer determined mineral macro. The proximate content of mangrove gastropods in Bakau Village is high in protein (48.06–54.62%) and low in fat (1.31–7.40%). The most elevated protein was 54.62 in Ellobium and Pirenella, with the lowest fat being 1.31%. The macro mineral content in gastropods is Ca (14.91-91.48 mg/kg), Mg (13.16-21.74 mg/kg), Na (8.19-20.62 mg/kg), K (13.07-17.33 mg/kg), and P (0.66-0.71 mg/kg). The highest mineral content was shown by the genus Pirenella (91.48 mg/kg) Ca.

Keywords: gastropod, macromineral, mangrove, proximate.

Abstrak

Gastropoda adalah kelas terbesar dari filum moluska dengan 75.000 jenis yang telah teridentifikasi. Gastropoda terdistribusi luas di perairan tawar, perairan laut, dan ekosistem mangrove. Gastropoda merupakan salah satu komoditas perikanan dengan nilai ekonomis penting yang mengandung protein tinggi (36-70,8%) dan lemak yang rendah (0,02-1,50%). Biota ini juga memiliki vitamin, mineral esensial, omega-3 dan omega-6. Penelitian ini bertujuan untuk mengetahui kandungan proksimat (protein, lemak, air, abu, dan karbohidrat) serta makromineral (Na, K, Mg, Ca, dan P) pada gastropoda yang ditemukan di Desa Bakau, Kabupaten Sambas, Kalimantan Barat. Gastropoda yang ditemukan pada penelitian ini adalah Ellobium, Cerithidea, dan Pirenella. Setiap jenis dari gastropoda, masing-masing diambil sebanyak 50 individu untuk dilakukan analisis. Kadar air dan abu ditentukan dengan metode gravimetri. Kadar total protein dianalisis dengan metode Kjedahl. Kadar lemak ditentukan dengan metode soxhlet dan kadar karbohidrat dengan metode by difference. Makro mineral ditentukan dengan Spektrofotometer Serapan Atom. Kandungan proksimat dari jenis gastropoda mangrove Desa Bakau adalah tinggi protein (48,06–54,62%), rendah lemak (1,31–7,40%). Protein tertinggi 54,62 pada Ellobium dan Pirenella dengan lemak terendah 1,31%. Kandungan makro mineral pada gastropoda adalah Ca (14,91-91,48 mg/kg), Mg (13,16-21,74 mg/kg), Na (8,19-20,62 mg/kg), K (13,07-17,33 mg/kg), dan P (0,66-0,71 mg/kg). Kandungan mineral tertinggi ditunjukkan oleh genus Pirenella (91,48 mg/kg) Ca.

Kata kunci: gastropoda, makromineral, mangrove, proksimat.

Suitability Index and Supporting Capacity of Mangrove Ecotourism in Darunu Mangrove Park Wori District North Minahasa Regency

Tue, 19 Mar 2024 00:00:00 +0800

The purpose of the study was to determine the type of mangrove, mangrove density, mangrove thickness, tides, associated biota objects, tourism suitability index, and carrying capacity of the Darunu mangrove tourism area. The research period is October-December 2023. The research methods used are cruising survey for mangrove species, line transect for mangrove density, remote sensing for mangrove thickness, and visualization for associated biota objects. Data analysis for the tourism suitability index (IKW) and area carrying capacity (DDK) is guided by the provisions of Yulianda (2019). The IKW value is 2.0 with the appropriate category and the DDK value is 25 people per day. The size of the DDK value of the mangrove tourism area depends on two main factors, namely the length of tracking and the length of operating time. The greater the value of tracking length and the length of operating time, the greater the DDK value, conversely the smaller the value of tracking length and the length of operating time, the smaller the DDK value. As a recommendation to the village government to be able to extend the tracking distance by utilizing the mangrove spaces that are still available, in addition to the tourist period can be extended with adequate facilities such as electricity, lighting, etc. so that the value of DDK can still be achieved as much as possible to increase the economic income of the village community while still paying attention to environmental sustainability. Furthermore, community participation to preserve this mangrove forest area is needed for the sustainability of ecotourism-based mangrove tourism at Darunu Mangrove Park.

Keywords: Area carrying capacity, Darunu Mangrove Park, Ecotourism, Mangrove, Tourism suitability index.

Abstrak

Tujuan penelitian adalah untuk mengetahui jenis mangrove, kerapatan mangrove, ketebalan mangrove, pasang surut air laut, objek biota asosiasi, indeks kesesuaian wisata dan daya dukung kawasan wisata Darunu Mangrove Park. Periode penelitian yaitu Oktober-Desember 2023. Metode penelitian yang digunakan yaitu survey jelajah untuk jenis mangrove, transek garis untuk kerapatan mangrove, penginderaan jauh untuk ketebalan mangrove, visualisasi untuk objek biota asosiasi. Analisis data untuk indeks kesesuaian wisata (IKW) dan daya dukung kawasan (DDK) berpedoman pada ketentuan dari Yulianda (2019). Nilai IKW sebesar 2,0 dengan kategori sesuai dan nilai DDK sebanyak 25 orang per hari. Besar kecilnya nilai DDK kawasan wisata mangrove tergantung pada dua faktor utama, yaitu panjang tracking dan lamanya waktu operasi. Semakin besar nilai panjang tracking dan lamanya waktu operasi, maka semakin besar pula nilai DDK tersebut, sebaliknya semakin kecil nilai panjang tracking dan lamanya waktu operasi maka semakin kecil nilai DDK tersebut. Sebagai rekomendasi kepada pemerintah desa untuk dapat memperpanjang jarak tracking dengan memanfaatkan ruang-ruang mangrove yang masih tersedia, disamping itu periode waktu wisata dapat diperpanjang dengan dilengkapi fasilitas yang memadai seperti listrik, penerangan, dan lain-lain, agar nilai DDK masih dapat dicapai semaksimal mungkin dalam rangka peningkatan pendapatan ekonomi masyarakat desa dengan tetap memperhatikan kelestarian lingkungannya. Selanjutnya peran serta masyarakat untuk menjaga kelestarian kawasan hutan mangrove ini sangat dibutuhkan demi keberlanjutan wisata mangrove berbasis ekowisata di Darunu Mangrove Park.

Kata kunci: Daya dukung kawasan, Darunu Mangrove Park, Ekowisata, Indeks kesesuaian wisata, Mangrove.

The Fish Community Of The Tondano River Estuary In Manado City

Thu, 28 Mar 2024 00:00:00 +0800

This study was conducted to determine the relative abundance, species composition, relative abundance, and structure of fish communities. The data collection method used was the “Swept area” method. Sampling was conducted twice. The first sampling was conducted on June 17, 2023, and the second sampling was conducted on July 4, 2023, at the Tondano River estuary. Data collection was conducted at low tide. The data analysis used was relative abundance, diversity index, evenness index, and dominance index. The results of this study showed that the fish species composition in the Tondano River estuary consisted of 15 families, 15 genera, and 18 species with a total of 288 individuals. Between the two observed months, June and July, the number of species was higher in June. Based on the data analysis, the highest relative abundance in the Tondano River estuary was in the June phase, namely the Ambassis urotaenia species with a value of 31.5%. The diversity of fish species in the June and July phases was classified as quite high, considering the relatively high evenness index and low dominance index.

Keywords: Tondano River Estuary, Relative Abundance, Diversity Index.

Abstrak

Penelitian ini dilakukan dengan tujuan untuk mengetahui kelimpahan relatif, komposisi spesies ikan, kelimpahan relatif dan struktur komunitas ikan. Metode pengambilan data ikan menggunakan metode metode “Swept area”. Pengambilan sampel dilakukan sebanyak 2 kali. Pengambilan sampel pertama dilakukan pada bulan juni tanggal 17 juni 2023 dan pengambilan sampel kedua dilakukan pada bulan juli tanggal 4 juli 2023 yang berlokasi di Muara Sungai Tondano. Pengambilan data dilakukan pada waktu surut. Analisis data yang digunakan adalah kelimpahan relatif, indeks keanekaragaman, indeks kemerataan, dan indeks dominansi. Hasil penelitian ini menunjukkan komposisi jenis ikan di Muara Sungai Tondano terdiri 15 famili, 15 genus dan 18 spesies dengan total 288 individu. Diantara kedua fase bulan yang diamati, yaitu bulan Juni dan bulan Juli, jumlah spesies lebih banyak ditemukan pada Juni. Berdasarkan hasil analisis data kelimpahan relatif tertinggi di Muara Sungai Tondano ada pada fase Juni yaitu spesies Ambassis urotaenia dengan nilai 31.5 %. Keanekaragaman jenis ikan pada fase bulan Juni dan Juli tergolong cukup tinggi dengan memperhatikan indeks kemerataan yang cukup tinggi dan indeks dominansi yang rendah.

Kata kunci: Muara Sungai Tondano, Kelimpahan Relatif, Indeks Keanekaragaman.

Macro Mineral Profile of Several Species of Brown Macroalgae from Lemukutan Waters as Biostimulant Candidates

Warsidah, Anthoni Batahan Aritonang, Rita Kurnia Apindiati — Sat, 30 Mar 2024 00:00:00 +0800

Biostimulants are natural or synthetic substances that can be used to stimulate plant growth, development, and defense responses and can be obtained from various sources such as plants, phytohormones, and microorganisms. Macroalgae is one of the potential marine biota that can be used as a biostimulant because it contains a lot of chemicals such as micro, macro minerals, and phytohormones. As a first step in exploring macroalgae from the waters of Lemukutan Island as biostimulant candidates, this research was carried out to determine the macro mineral content of calcium, potassium, sodium, and phosphorus from macroalgae types Turbinaria and Sargassum. The research was carried out using the atomic absorption spectrophotometric (AAS) analysis method. The results of determining the macro mineral content show that Turbinaria sp has a Calcium (Ca) content of 13.20 mg/kg, Potassium (K) of 31.24 mg/kg, Sodium (Na) of 21,45 mg/kg and Magnesium (Mg) of 17.5 mg/kg, while Sargassum sp has a Calcium (Ca) content of 10.50 mg/kg, Potassium (K) of 26.35 mg/kg, Sodium (Na) of 30.55 mg/kg and Magnesium (Mg) of 18.7 mg/kg.

Keywords: Biostimulants, AAS, macro minerals, phytohormones.

Abstrak

Biostimulan adalah substansi alami atau sintetis yang dapat digunakan untuk merangsang pertumbuhan, perkembangan, dan respons pertahanan tanaman dan dapat diperoleh dari berbagai sumber seperti tanaman, fitohormon dan mikroorganisme. Makroalga adalah salah satu biota potensial dari laut yang dapat digunakan sebagai biostimulan karena kandungan kimianya sangat banyak seperti mineral mikro, makro dan fitohormon. Sebagai langkah awal dalam eksplorasi makroalga dari perairan pulau Lemukutan sebagai kandidat biostimulan, maka penelitian ini dilakukan untuk menentukan kandungan makro mineral kalsium, kalium, natrium dan posfor dari makroalga jenis Turbinaria dan Sargassum. Penelitian dilakukan menggunakan metode analisis spektrofotometri serapan atom (SSA). Hasil penentuan kandungan mineral makro tersebut menunjukkan Turbinaria sp memiliki kandungan Kalsium (Ca) sebesar 13,20 mg/kg, Kalium (K) sebesar 31,24 mg/kg, Natrium (Na) sebesar 21,45 mg/kg dan Magnesium (Mg) sebesar 17,5 mg/kg, sedangkan Sargassum sp memiliki kandungan Kalsium (Ca) sebesar 10,50 mg/kg, Kalium (K) sebesar 26.35 mg/kg, Natrium (Na) sebesar 30.55 mg/kg dan Magnesium (Mg) sebesar 18,7 mg/kg.

Kata kunci : Biostimulan, SSA, mineral makro, fitohormon.

Comparative Studies Of Residual Water Level In Manado And Melonguane Coastal Area During Tropical Cyclone In 2021

Sat, 30 Mar 2024 00:00:00 +0800

North Sulawesi Province, directly bordering the Pacific Ocean, is located in an area with the highest level of tropical cyclone (TC) activity in the world. As a result, the province is vulnerable to the impacts caused by cyclones, including storm surges. The increase in water levels due to this event has the potential to cause coastal flooding. Previous studies in Manado have identified that sea level rise can be detected through residual water level (RWL), making studying the characteristics of RWL in North Sulawesi important. This research focuses on Manado and Melonguane, allowing for a comparison of characteristics. The data used includes tropical cyclone data from the China Meteorological Administration (CMA) and tidal data from the Geospatial Information Agency. The Unified Tidal Analysis and Prediction (UTide) method is used to identify RWL. The analysis was carried out by using a t-test to compare data at the two locations. The results showed that RWL at those locations had significant differences with Melonguane having the higher value between them. Generally, the increase in RWL in Melonguane occurs shortly after the cyclone period, while the RWL in Manado maximum increases 86 hours after TC's first occurrence.

Keywords: tropical cyclone; residual water level; UTide.

Determination of Micro Minerals of Several Species of Sea Urchins from Samboang Waters as Functional Food Candidates

Lucky Hartanti, Warsidah, Shifa Helena, Tahirah, Irwan — Sat, 30 Mar 2024 00:00:00 +0800

Functional foods are foods that can be consumed with additional health benefits beyond their basic function as an energy source. The search for food sources from the sea is increasing, with many discoveries of active compounds from marine organisms. This research aims to determine the micromineral content of iron (Fe), zinc (Zn), and iodine (I) in several species of sea urchins in the coastal waters of Samboang Bulukumba. The results of this research can be a basis for utilizing this biota as a functional food. This laboratory research uses micromineral measurement instruments, for example, Atomic Absorption Spectrophotometry (AAS) for Fe and Zn, while for iodine minerals using High Performed Liquid Chromatography (HPLC) instruments. In this study, 2 types of sea urchins were found which were identified as Diadema cytosum and Tripneustes gratilla. The results of measuring the water content and ash content of the gonads of the two sea urchins were 77.32% and 1.15% for Diadema cytosum and 72.22% and 2.09% for Tripneustes gratilla. The results of measuring the levels of micro minerals Fe, Zn, and Iodine were respectively 115.24 ppm, 31.44 ppm and 16.71 ppm for Diadema cytosum and 150.75 and 27.27 ppm 21.21 ppm for Tripneustes gratilla.

Keywords: functional food, AAS, HPLC, Diadema cytosum, Tripneustes gratilla

Abstrak

Pangan fungsional adalah makanan yang dapat dikonsumsi dengan manfaat kesehatan tambahan di luar dari fungsi dasarnya sebagai sumber energi. Pencarian sumber pangan dari laut semakin meningkat, dengan banyaknya penemuan senyawa-senyawa aktif dari organisme laut. Penelitian ini bertujuan menentukan kandungan mikro mineral besi (Fe), seng (Zn) dan yodium (I) dalam beberapa spesies bulu babi di perairan pantai Samboang Bulukumba. Hasil penelitian ini dapat menjadi dasar dalam memanfaatkan biota tersebut sebagai pangan fungsional. Penelitian laboratorium ini menggunakan instrumen pengukuran mineral mikro misalnya dengan penggunaan Atomic Absorption Spectrofotometry (AAS) untuk Fe dan Zn, sedangkan untuk mineral yodium menggunakan instrumen High Performed Liquid Chromatography (HPLC). Dalam penelitian ini ditemukan 2 jenis bulu babi yang teridentifikasi sebagai Diadema sitosum dan Tripneustes gratilla. Hasil pengukuran kadar air dan kadar abu gonad kedua bulu babi tersebut diperoleh 77.32% dan 1.15% untuk Diadema sitosum dan sebesar 72.22% dan 2.09% untuk Tripneustes gratilla. Hasil pengukuran kadar mineral mikro Fe, Zn dan Yodium masing-masing adalah sebesar 115.24 ppm, 31.44 ppm dan 16.71ppm untuk Diadema sitosum dan 150.75 dan 27.27 ppm 21.21 ppm untuk Tripneustes gratilla.

Kata kunci : pangan fungsional, AAS, HPLC, Diadema sitosum, Tripneustes gratilla

Estimation of Biomass and Below Ground Carbon in the Lepar Island Mangrove Ecosystem, South Bangka Regency

Tue, 02 Apr 2024 00:00:00 +0800

Mangrove ecosystems are similar to other forest ecosystems in that they play a role in absorbing CO2 from the atmosphere. Mangrove ecosystems can store more carbon compared to most rainforests. This is because mangrove plants utilize CO2 for photosynthesis and store it in the form of biomass and sediments. The purpose of this research is to determine the potential of mangrove ecosystems in absorbing and storing carbon, particularly the content of below-ground carbon and Biomass from several locations on Lepar Island. The data collection method used systematic sampling, where the placement of sampling plots had regular distances from the sea to the land. Substrate samples were taken using a core sampler tool and analyzed using the Loss of Ignition (LOI) method to determine carbon content. The research results showed that the average soil density at all stations was 1.0 g/cm3. The average percentage of organic carbon at all stations was 0.09 C%. The average total carbon content at all stations was 105.73 tons/ha. Mangrove forests are capable of storing a large amount of carbon in both biomass and sediments.

Keywords: Belowground, Karbon, Lepar Island

Abstrak

Ekosistem mangrove sama halnya dengan ekosistem hutan lain yang memiliki peran sebagai penyerap CO2 dari atmosfer. Ekosistem mangrove mampu menyimpan lebih banyak karbon dibandingkan dengan kebanyakan hutan hujan. Hal ini dikarenakan tumbuhan mangrove memanfaatkan CO2 untuk fotosintesis dan menyimpannya dalam bentuk biomassa dan sedimen. Tujuan penelitian ini untuk mengetahui potensi ekosistem mangrove dalam menyerap dan menyimpan karbon terutama kandungan pada Belowground Carbon mangrove dan Biomassa dari beberapa lokasi yang ada di pulau lepar. Metode pengambilan data dilapangan menggunakan systematic sampling method, dimana penempatan plot sampling memiliki jarak yang teratur antar plot dari laut ke darat. Pengambilan sampel substrat menggunakan alat core sampler dan dilakukan dengan metode komposit. kemudian dianalisis kandungan karbon menggunakan metode Loss of Ignition (LOI). Hasil penelitian menunjukan nilai rata-rata densitas tanah seluruh stasiun yaitu sebesar 1,0 g/cm³. Nilai rata-rata presentase karbon organik pada seluruh stasiun yaitu sebesar 0,09 C%. Nilai rata-rata kandungan karbon total pada seluruh stasiun yaitu sebesar 105,73 ton/ha. Hutan mangrove mampu menampung kandungan karbon dengan jumlah besar baik di biomassa dan sedimen.

Kata Kunci :Belowground, Karbon, Pulau Lepar

The Fish Community Of The Sario River Estuary In Manado City

Wed, 10 Apr 2024 00:00:00 +0800

The purpose of this research was to determine the fish species composition, relative abundance, and community structure, including ecological indices. The methods used in this study were general field survey methods and fish capture methods using the “swept area” method (Sparre & Venema, 1998). Data were collected based on the time of collection using beach seine gear. The research was conducted in several stages, including fish catching in the field, data analysis, and discussion. The results of this study showed that there were 13 species from 11 families of fish in the Sario River Estuary. The total population obtained in June and July was 292 individuals. 215 individuals were caught in June and 77 individuals were caught in July. The highest composition in both months was the species Ambassis urotaenia, while the lowest number was several species, namely Caranx ignobilis, Osteomugil cunnesius, and Zenarchopterus buffonis. The highest relative abundance in both months was the species Ambassis urotaenia (73.49% and 66.23%). The lowest relative abundance was Caranx ignobilis, Tylosurus crocodilus, and Zenarchopterus buffonis with values of (1.30%). Sillago sihama, Chelonodontops patoca (0.93%). The results of the study showed the community structure in Sario River Estuary in June and July (H' = 0.91 – 0,97, J' = 0.44 – 0.54, D = 0.49 -0.57).

Keywords: Fish, Sario River Estuary, Relative Abundance, Community Structure

Abstrak

Penelitian ini bertujuan untuk mengetahui komposisi jenis ikan, kelimpahan relatif dan struktur komunitas yang meliputi indeks ekologi.Metode yang digunakan dalam penelitian ini yaitu metode umum survei lapangan dan metode penangkapan ikan menggunakan metode “swept area” (Sparre & Venema, 1998). Pengambilan data dilakukan berdasarkan waktu pengambilan menggunakan alat tangkap pukat pantai (beach seine). Penelitian ini dilakukan dengan beberapa tahapan yaitu penangkapan ikan di lapangan yang akan menjadi data, analisis data serta pembahasan.Hasil penelitian ini menunjukkan terdapat 13 spesies dari 11 famili ikan di Muara Sungai Sario. Dengan total populasi yang didapat pada bulan Juni dan sbulan Juli 292 individu. 215 individu tertangkap pada bulan Juni dan 77 individu tertangkap pada bulan Juli. Komposisi tertinggi pada kedua bulan adalah jenis Ambassis urotaenia, sedangkan jumlah terendah ada beberapa jenis yaitu Caranx ignobilis, Osteomugil cunnesius, Zenarchopterus buffonis. Kelimpahan relatif tertinggi pada kedua bulan adalah jenis Ambassis urotaenia (73,49% dan 66,23%). Sedangkan kelimpahan relatif terendah yaitu Caranx ignobilis, Tylosurus crocodilus dan Zenarchopterus buffonis dengan nilai (1,30%). Sillago sihama, Chelonodontops patoca (0,93%). Hasil penelitian menujukkan struktur komunitas di Muara Sungai Sario pada bulan Juni dan bulan Juli (H' = 0,91 – 0,97, J' = 0,44 – 0,54, D = 0,49 -0,57).

Kata kunci: Ikan, Muara Sungai Sario, Kelimpahan Relative, Struktur Komunitas.

The Nursery of Juvenile Sandfish, Holothuri scabra in Pen-culture

Pitjont Tomatala, Usman Madubun — Fri, 26 Apr 2024 00:00:00 +0800

This research aims to be a reference for better and regionally characteristic sandfish nursery activities to support sustainable sea cucumber farming. This research was carried out in the waters of Ohoitel village, Tual City, and took place from March – April 2023. 450 sandfish seeds measuring 0.39 – 1.98 gr were stocked in Pen-culture measuring 4 x 3 x 0.7 meters. Pen culture is made of waring and has a cover. Calculation of survival and growth measurements only at the beginning and end of rearing. Water quality measurements (temperature, salinity, and pH) were carried out every week during the research. Based on the research results, it can be concluded that the nursery of seeds sandfish measuring 0.39 – 1.98 gr can be done in Pen-culture using a cover. This is because the survival percentage of sandfish chicks raised in Pen-culture is 84 - 86.67% with an average survival percentage of 85.33% and a body weight growth range of 2.54 - 12.97 gr with an average of the average absolute growth in body weight was 6.77 gr.

Keywords: Nursery, Sandfish, Pen-culture

Abstrak

Penelitian ini bertujuan menjadi referensi kegiatan pendederan teripang pasir yang lebih baik dan berkarakteristik daerah guna menopang budidaya teripang secara berkelanjutan. Penelitian ini dilaksanakan di perairan desa Ohoitel, Kota Tual dan berlangsung dari Maret 2023 – April 2023. Benih teripang pasir berukuran 0,39 – 1,98 gr sebanyak 450 ekor ditebar pada Pen-culture berukuran 4 x 3 x 0,7 meter. Pen-culture terbuat dari waring dan memiliki penutup. Perhitungan kelangsungan hidup dan pengukuran pertumbuhan hanya pada awal dan akhir pemeliharaan. Pengukuran kualitas air (suhu, salinitas dan pH) dilakukan setiap minggu selama penelitian. Berdasarkan hasil penelitian dapat disimpulkan bahwa pendederan anakan teripang pasir berukuran 0,39 – 1,98 gr dapat dilakukan pada Pen-culture dengan menggunakan penutup. Hal ini dikarenakan presentase kelangsungan hidup anakan teripang pasir yang didederkan pada Pen-culture sebesar 84 – 86,67 % dengan rata-rata persentase kelangsungan hidup 85,33 % dan kisaran pertumbuhan berat tubuh sebesar 2,54 – 12, 97 gr dengan rara-rata pertumbuhan mutlak berat tubuh sebesar 6,77 gr.

Kata kunci : Pendederan, Teripang pasir, Pen-culture